Improvement in railboad-car ventilators



I'sAAo'DnrPPs, or Four WAYNE, INDIANA.

Letters Pate-nt No. 75,878, dated March 24, 1868.

IMPROVEMENT IN RAILROAD-GAR VENTILATOBS.

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TO ALL WHOM I'l MAY CONCERN: y

Bc it known that I, ISAAC DRIPS, of Fort' Wayne, in the county of Allen,and State of Indiana, have invented a new and useful Improvement inVentilators for Railway-Cars, Ships, or other analogous uses; andI dohereby declare that the following is a. full, clear, and exactdescription of the same, reference being made to the annexed drawings,making part of this specification, in which-- Figure 1 is a longitudinalvertical section, and

Figure 2 is a transverse vertical section.

My improvement consists in the combination of a tapering, tubular,revolving hood and a ventilating-tube with an adjustable valve for4regulating the current outwards, created by the passage ofthe current ofair across the hood. The construction will appear from the followingdescription, which' will enable those skilled in the art to constructand apply 'my improved ventilator.

In the annexed drawings, A is a. vertical pipe, passing through the roofof a ear or deck of a ship, Sto., forming a channel for a current of airflowing outwardly. Over the upper end of this pipe is placed a tubularhood, B, in the form of the frustum of -a cone. It is suspended upon arod, 0,'which stands vertically in the middle of the pipe A, restinguponl internal braces D. An opening is made in the lower side of thehood, alittle larger than the diameter of the pipe, and from it atubular flange is extended downwards, below the top of the pipe, but nottouching the same, so that the hood may revolve freely on the p ivotC.The hood is open at both ends, and has avane, N, fastened on top, andextending longitudinally along the hood, from the larger end towardsthe'sinaller, so that the windV 'or the current of air, -created by themotion of the cars, shall maintain the smaller end inthe directiontowards which the car is moving, or from which the wind is blowing. Aninclined shield, K, is placed on the side ofthe downward pipe nearestthe smaller end of the hood, and extended towards thc opposite endnearly to the-pivot'C. lhisisY to so direct snow, rain, sparks, or othersubstances entering the smaller end of the hood, that they shall becarried by the current of air over the pipe A, and out at the larger endof the hood. In the bottom ofthe pipe A, I place the wings E E of abuttcrily-valve,` turning upon central rod and folding upwards, A spiralspring, coiled around this rod, presses the wings down. They may beraised by the points of a bifurcated bell-crank lever, H. This lever maybe held a't any desired point by-a pin passing through one of a seriesof holes in the segment L, so that the valves may be opened to anyrequired extent.

Other forms of valves may, however, be used instead of the onedescribed. I prefer this arrangement, however, as being simple, andafording a convenient means of regulating the current of air passingthrough the ventilator.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The combination of thcwings E, of a butterily-valve, the bifurcatcdbell-crank level.` H, and segment ',li, arranged to operatesubstantially as and for the purposes described.

2. The combination of the tapering tubular hood B, pipe A, and theregulating-valve placed in the latter, arranged to operate substantiallyin the manner and for the purpose set forth.

rsAAo DRIPPS.

4Witnesses:

lV. A.` Dmrrs, .Tnosf MEEGAN

